Tiara, Penta Yurlita and Epon, Nur’aeni and Oyon, Haki Pranata (2015) THE ENHANCEMENT ABILITY OF MATHEMATICAL CONNECTION IN PARALELLOGRAM MATERIAL THROUGH LEARNING BASED ON VAN HIELE THEORY IN CLASS V SDN 1 CIBATUIRENG. Proceeding of International Conference On Research, Implementation And Education Of Mathematics And Sciences 2015 (ICRIEMS 2015), Yogyakarta State University, 17-19 May 2015. ISSN 978-979-96880-8-8